How to solve error in port widths or dimensions in Simulink?

Hello, I am trying to do a linearization in simulink but when I run the model the errors appear

• Error in port widths or dimensions. 'Output Port 1' of 'Pendulum/Mux' is a one dimensional vector with 6 elements.
• Error:Error in port widths or dimensions. 'Input Port 1' of 'Pendulum/Simulink-PS Converter' is a one dimensional vector with 1 elements.

Here is an image of the model.

Does anyone know how to solve it?

[Divyanshu]

Hi Carlos,

Can you share the model, as it is difficult to figure out the issue just from image of the model?